Alan wrote:>> As a test of raw CPU power I've been decompressing the kernel tree, with >> a UP 2.6 kernel this takes about 1m 15s, I don't know if bz2 is >> multithreaded but even if it's not I would expect a slight speed increase >> but in fact with a SMP 2.6 kernel it take 13 ~ 26m, with a SMP 2.4 >> kernel it takes 1m 28s and with a 2.4 UP 1m 35s. > > The 2.4 numbers look correct (slightly slower), the 2.6 numbers do not.> > > Nothing obviously wrong from the traces however. If you pin the bzip to a> given processor do you get different results according to which CPU ?> > (see man taskset for info on the commands)> > If you get very different times on the two processors that will be very> useful information.

Mmm CPU 0 in 1m 32s, but I was running things like ps and taskset in another terminal to verify affinity, CPU 1 still hadn't finished in 40m when I killed it. I've downloaded the LFDK mentioned in the other post and will post the results when I have them.